Slashdot Mirror
Home Wind-Power Turbines Make Headway
Pickens writes "Wind turbines, once used primarily for farms and rural houses far from electrical service, are becoming more common in heavily populated residential areas as homeowners are attracted to ease of use, financial incentives and low environmental effects. Experts on renewable energy say a convergence of factors, political, technical and ecological, is causing a surge in the use of residential wind turbines, especially in the Northeast and California. "Back in the early days, off-grid electrical generation was pursued mostly by hippies and rednecks, usually in isolated, rural areas," said Joe Schwartz, editor of Home Power magazine. "Now, it's a lot more mainstream." Some of the new "plug and play" systems can be plugged directly into a circuit in the home electrical panel and homeowners can use energy from the wind turbine or the power company without taking action. Schwartz says that even with the economic benefits, it can take 20 years to pay back the installation cost. "This isn't about people putting turbines in to lower their electric bills as much as it is about people voting with their dollars to help the environment in some small way," he said."
Another way to be more environmentally friendly would be to use adobe or compressed earth building techniques.
In this area, we get about the same amount of yearly rainfall as in places like Santa Fe, New Mexico where the use of adobe is very common. I think it would do quite well.
For cooling, swamp coolers work quite well for us.
They found that is not the case. Birds hardly get killed by turbines - accidents happen of course, but are rare.
The researchers thought that this is because of the noise those turbines make, even upwind this is audible to the birds at sufficient distance. So they just fly around them. The mortality was as low or lower than around power lines: those also kill birds that happen to fly into them.
This result actually surprised the researchers, in a happy way of course. And the research being done by a.o. animal protection groups gives it quite some credit to me.
Farms have been using wind power for centuries. If you have a bungalow at the sea side with permanent wind, then a simple DIY setup made from a 24V, 24 inch cooling fan for a stationery motor mounted on a post, can easily charge a 12V battery through a single diode to run lights and a small TV and the cost is really minimal if you keep it simple. My father did that for many years, till the grid finally caught up. (You need a diode, else you have a big cooling fan, instead of a charger...) If you are a geek with serious electricity needs, then you may need two or three of those, but that will still be cheaper than buying a single larger commercial unit.
Excuse me, but please get off my Pennisetum Clandestinum, eh!
It's not "300-400", but...
"The BWC EXCEL (http://www.bergey.com/) is a modern 6.7 meter (22 ft) diameter, 10,000W wind turbine designed for high reliability, low maintenance, and automatic operation in adverse weather conditions"
"Prices, which include a voltage regulator, pump controller, or a line-commutated inverter, range from $21,900 to $27,900."
"The BWC EXCEL is most often installed on a guyed lattice tower, which is available in heights of 18 m (60 ft.) to 43 m (140 ft.). Prices range from $7,400 to $12,680. "
SO, *worst case scenario* is 27,900 + 12,680 = $40,580.
Now, Electricity is what, about 10 cents per kilowatt hour? So $40,580 will buy 405,800 kwh of electricity.
In the last 2 months, I used a total of 946 kwhs for my small 2br apartment. Let's say a house'll use twice that, or about 1000kwh per month.
It'll take 405 months (33 years) for the system to pay for itself.
Of course, Your electric bill is more than just 'kwh x price per kwh'. Heck, I pay more in "Power Supply Charges" than I do in "delivery and System charges". All in all, I pay 19.39 cents per kwh. That means $40,580 will buy 209,499 kwh of electricity, and the system pays for itself in 210 months, or 17.5 years.
Of course, that doesn't take into account any future electricity price increases. It also doesn't take into account how, with the right system, you can keep up and running indefinitely the next time there is a grid blackout or winter storm that knocks out the power.
Not always true. There are two types of 'buy back'- One (netmetering) uses one meter that can go in both directions. If you are using more than you are producing, the meter goes forward. If you are producing more, it winds Backward. If it ends up at at a higher number at the end of the period (month/quarter/year), you pay for the net amount you used. If it ends up at at a lower number, you do NOT get paid for the extra you gave them.
The other way is to have 2 meters- one for what you use, and one for what you sell to them. Even though they only pay wholesale rates, it would be possible to sell them more than you use, and actually make money.
While payback period may be the easiest measure to calculate, it's not a very good one. You really need to be calculating either IRR or mortgage length if you want to determine whether something is a good investment. They're different ways to measure the same thing. Basically, when you install something like a wind turbine or solar setup, you're buying an annuity. You need to show that that annuity is a better investment than other comparable investments on the open market.
I'll BUILD someone to replace you. Some kind of gamma-powered monster, with a heart as black as coal!
Replying to myself to say:
.. 5.3 kWh Battery Bank (B220-4)
/of course 1000 watts is a little low for most people...
if the above system seems a bit costly, try this:
$2,590 1 kW XL.1 Turbine, with PowerCenter
$1,595 60 ft. Tilt-up Tower
$450
$1,044 1,500 W Inverter System
$5,679 Total Cost
$5679 = 29318 kwh, which is 30 months payback.
I highly recommend some sort of battery charge controller. I happen to have used and like the MorningStar SunSaver models, but there are a wide variety out there. At $50 or so, they're not that expensive, and they'll make your battery last a lot longer, especially if you deep cycle it and let it charge completely often. A simple diode will work, but it will overcharge the battery and shorten its lifespan. Longer battery life will easily pay for the charge controller for most usage patterns.